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Richard (Tao) Song , Jenny Carter, Steve Sembay University of Leicester. 3x3 binning pattern experiment. Aims. See how different pattern distributions for 3x3 binned event list is from ‘normal’ event list Check the normal event list pattern distributions against the CCF - PowerPoint PPT Presentation
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XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
3x3 binning pattern experiment
Richard (Tao) Song , Jenny Carter, Steve Sembay
University of Leicester
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
Aims• See how different pattern distributions for 3x3 binned event list is
from ‘normal’ event list• Check the normal event list pattern distributions against the CCF• Create pattern distribution fractions for the 3x3 mode• Eventually create a nice QE CCF for the 3x3 binning mode• Use recent observation of Vela SNR:
• Normal:• DATE-OBS: 2007-05-01T19:03:57• LIVETIME : 47.8 ks• NAXIS2 : 1139927
• 3x3 binning: • DATE-OBS: 2007-05-02T09:00:01• LIVETIME : 31.4 ks• NAXIS2 : 3057523
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
Selection region for analysis
Excludingbright col.
here
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
Comparing normal event list to CCF pattern distribution - PHA
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
Comparing normal event list to CCF pattern distribution - PI
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
Fitting
• Use logarithmic binning and spline fitting
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
PHAPHA – 3x3
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
Scaling CCF
• Use ratio 3x3 binning to normal and use this scale factor to scale the CCF• File: EMOS1_QUANTUMEFF_0017.CCF
• Extensions FRACTION_CHANNEL, FRACTION_ENERGY
Red is the 3x3 fraction distribution, green is the normal binning distribution
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
Future work and conclusions
• Check gain etc. of the 3x3 mode
• Look at spectral differences between normal and 3x3 binning
• Apply background subtraction to current analysis
• Look at MOS2
• Compare with any more observations
• Apply the ratio found to the current CCF, give to RS….
• …create a new 3x3 QE CCF
XMMEPICMOS
Jenny Carter ([email protected])EPIC Calibration
Mallorca, 5th-7th Nov. 2007
Extra slides
